全球气候正经历一个以变暖为主要特征的变化过程，其中冬春季变暖尤为突出，而现今定量重建的大多为生长季节（温暖）的温度，缺乏非生长季节温度的定量重建，为了更全面地理解过去气候变化及其驱动机制，有必要对温暖和寒冷季节的温度同时进行定量重建。本项目拟依据现代湖泊表层沉积硅藻、金藻孢囊和盘星藻建立生物与温度等环境要素的转换函数，并将其应用到云南不同类型湖泊定量重建中，定量重建全新世以来云南地区不同季节的古温度和古环境序列；进而对硅藻、金藻孢囊和盘星藻群落结构特征以及多样性进行分析，揭示以硅藻、金藻孢囊和盘星藻为代表的水生生态系统对气候和湖泊环境变化的响应特点与可能机理，并判识引发其突变的温度或环境阈值范围，为生态系统保护和恢复提供理论基础，为评估现代增暖期的生态环境效应提供重要的借鉴和估量的参考值。本项目将在不同季节温度定量化方面取得进展。

The global climate is experiencing a process of warming, which is particularly prominent in winter and spring warming. Because of quantitative reconstruction is growing (warm) season temperature, lack of quantitative reconstruction temperature of no-growing (cold) season, it is necessary to quantitative reconstruction of warm and cold season temperature to more fully explore the past climate changes and its driving mechanism. This project will establish the diatom, chrysophyte, Pediastrum-based transfer function. The transfer function will be applicate to the quantitative reconstruction of different types of lakes in Yunnan, and achieve quantitative reconstruction of paleo-temperature and paleo-environment sequences of different seasons in Yunnan region since the Holocene. According to temperature series of quantitative reconstruction, diatoms, chrysophyte and Pediastrum characteristics of the community structure and diversity were analyzed to reveal the response of aquatic ecosystem to the climate and environment change and possible driving mechanism, and induced mutation temperature or the environmental threshold. These will provide a theoretical basis for restoration and protection of the ecological system, and provide important reference for a more comprehensive and correct assessment of ecological environment with modern warming effect. The research will have a progress in quantitative reconstruction of different seasons.